I am also on the same thought bro.
1)
I too have only Oracle and SQL skills but its really difficult in getting jobs with that skill alone. They are asking cloud as mandatory now with automation tools, migration tools etc. I tried to apply to many mncs and service based company with only referrals but no one called back. So there huge competition with just Database related skill. I would say anyway try to find jobs outside too with some growing,variety of skills(Cloud,Devops,AI)
I thought of same to learn snowflake or Databricks in data engineering. But even if we get certifications, it needs hands on experience to get some use cases of the tools. You can focus on one tool and learn try to get certificate for the same. Then in parallel can try outside.